August 28th, 2016, 06:16 PM  #2 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 13,979 Thanks: 994 
You posted 8 problems, but showed no attempts at solutions. Are you trying to get your homework done here? Concerning this problem, since posted in "Geometry section", is it assumed that no trigonometry is allowed? 
August 28th, 2016, 07:20 PM  #3  
Senior Member Joined: Feb 2010 Posts: 702 Thanks: 137  Quote:
Last edited by skipjack; October 28th, 2018 at 10:01 PM.  
August 28th, 2016, 08:25 PM  #4 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 13,979 Thanks: 994  You mean "only works when point M is at center of BC", right?
Last edited by skipjack; October 28th, 2018 at 10:01 PM. 
August 29th, 2016, 07:54 AM  #5 
Senior Member Joined: Feb 2010 Posts: 702 Thanks: 137  Yes, that is what I meant. Even though I was born and educated in the U.S., in school I took English as a foreign language.
Last edited by skipjack; October 28th, 2018 at 10:02 PM. 
August 29th, 2016, 09:06 AM  #6 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 13,979 Thanks: 994  
October 28th, 2018, 03:09 PM  #7 
Newbie Joined: Oct 2018 From: usa Posts: 1 Thanks: 0 
Let I be the point of intersection of (AN) and (HC) angle AMN = angle (HBC) ...... (1) BM/AM = BH/HM THEN 2(BM/AM) = BH/(HM/2) OR BC/AM = BH/MN SO BC/BH = AM/MN ........ (2) (1) AND (2) MEANS THAT THE 2 TRIANGLES CBH AND AMN ARE SIMILAR AND ANGLE NAM = ANGLE HCB THEREFORE THE QUADRILATERAL AIMC IS CYCLIC AND x = 90° Last edited by skipjack; October 29th, 2018 at 12:15 AM. 

Tags 
angle, calculate 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
calculate angle x  Nathalia  Geometry  1  September 3rd, 2016 08:45 AM 
Calculate angle when clock is 12 minutes past 7?  DecoratorFawn82  Geometry  3  November 26th, 2014 09:15 PM 
Calculate angle between two points.  snocavotia  Algebra  2  November 2nd, 2013 02:36 PM 
Calculate the acute angle between the lines with equations  bigwave  Algebra  2  August 24th, 2013 04:59 PM 
Calculate the inertia tensor of an offangle flat plate?  mrbiggl3s  Calculus  0  September 29th, 2011 04:42 AM 